PHOENIX (FOX 10/AP) - The low temperature in Phoenix on Wednesday dropped to 30 degrees, making it the coldest morning since 2013.
According to the National Weather Service, the temperature at Phoenix Sky Harbor International Airport was 30 degrees, the coldest since January 15, 2013 when it hit 29 degrees.
In southeastern Arizona, snow was falling early Wednesday in the Tucson area and other communities.
The state Department of Transportation reported whiteout conditions on State Route 90 near Sierra Vista and said it was sending plows to Interstate 10 in the Benson area.
The National Weather Service said snowfall by midmorning was beginning to decrease in Nogales in Santa Cruz County but was expected to intensity in Douglas in Cochise County as the morning went on.
Snowfall also was forecast in the White Mountains of east-central Arizona.
Forecasters issued a winter storm warning for the region until 5 p.m. MST.